Banff Spring Hotel Introduction: Banff Spring Hotel is famous for having the largest spa in Canada - Willow Spa, with 515 rooms and a capacity of 1,000. guest. Poppies, small flowers from Iceland, and flowers from the East are planted all around. The Bow River Falls directly below is the only waterfall in the smoothly flowing Bow River. Although the drop is small, the flow is turbulent and has a sense of force. It can be reached on foot from the hotel. Da.